SR 520 - Floating Bridge and Landings Project - Sentinel lights

What are the sentinels?

The new SR 520 floating bridge has four large towers, called “sentinels,” that mark the east and west ends of the world’s longest floating bridge. The tallest one, at the bridge’s east end, rises 123 feet above the lake’s surface. These towers not only add an architectural flair to the bridge, but also serve a critical function, allowing crews access to the bridge’s pontoon platform for maintenance.

Sentinel lighting

We illuminate the sentinels from dusk to dawn with LED lights. Teal is the standard color. Many color combinations are possible, however, which allows us to change the display color to commemorate holidays or support public events or causes of community significance.

How can I request a color change?

If you are interested in changing the sentinel lights for a public event or cause, please fill out our Sentinel Lighting Change Request Form (pdf 375 kb) and submit it to SR520Bridge@wsdot.wa.gov. Sentinel light changes are intended to recognize holidays and national and local campaigns, organizations and events of public significance. We cannot accommodate requests related to private events or political or religious events or campaigns. Details about the lighting policy and request process are listed in the request form (pdf 375 kb).

What lighting changes are coming up?

A calendar for the month of March 2020 labeled sentinels schedule. The nights of March 2 through 8 and 26 through 29 are shaded in various colors.

Dates: Monday, March 2, through Monday, March 9
Color: Red and pink
Cause: Light the night for Amyloidosis - the Amyloidosis Foundation
Description: The SR 520 sentinels will shine red and pink in support of Light the Night for Amyloidosis, an awareness campaign for Amyloidosis, which represents several different types of diseases where an abnormal protein (amyloid) is produced, causing health problems, organ damage, or organ failure.

Dates: Thursday, March 26, through Monday, March 30
Color: Blue and teal
Cause: Seattle Mariners 2020 Opening Day baseball game
Description: The SR 520 sentinels will be lit teal and blue this weekend to cheer on the Seattle Mariners as they begin their 2020 major league baseball campaign with their home opener.